This book refers to:
1977 - January 28, 1977
In a conversation about the character Annie being crazy, she says, "There was a man, few years ago, was supposed to be a hotel caretaker. He tried to kill his wife and kid. Then he blew the place to smithereens. He was crazy". This is a reference to The Shining. Later in the book, The Overlook is also mentioned by name.